Adjustable stand.



m. TYMCZYNA.

ADJUSTABLE STAND.A

APPLICATION HL'ED JuLY 2. 19|a.

1,293,253. Patented Feb. 4, 191?. I

VA I WA ZZ; g F591.

INVENTORl jz'fzazl fymczyfza, i BY ou ATTORNEY is formed with 45 UNITEDA sanrns APartnr ornion.

VIVIICI-IAL TYMCZYNA, OF CALDER, SASKATCHEWAN, CANADA.

ADJUSTABLE STAND.

To all whom t may concern:

Be it known that I, MICHAL TYMCZYNA, a subject of the Emperor of Austria, residing at Calder, Province of Saskatchewan, and

ominion of Canada,rhave invented certain new and useful Improvements in Adjustable Stands, of which the following is a specification.

This invention relates to improvements in furniture and particularly to adjustable and has as its special object the provision of means whereby the upper surface of the stand may be raised or lowered with relation to the base.

A further object is to provide means whereby such adjustment may be secured in an expeditious and easy manner, the parts being held securely when in adjustment.

These and other like objects are attained by the novel construction and combination of parts hereinafter described and shown in the accompanying drawing, forming a material part of this disclosure, and in which Figure l is a side elevational view showing a stand or table made in accordance with t e invention.

ig. 2 is a vertical sectional view taken substantially on line 2`2 of Fig. 1, and

Fig. 3 is a fragmentary transverse sectional view, taken on line 3`3 of Fig. 2.

he stand or table comprises a hollow support 10, here shown to be of rectangular cross-section, with which is rigidly engaged the legs 1l, carried on casters l2 as is usual so that the article may be readily moved over a relatively level surface.

e upper part of the stand is here shown be ormed with a concave or head 14, having downwardly extending side dicated to be rectangular in cross-section.

A downwardly projecting boss or hub 16 the lower surface of the con- 18, the same extending downward through a cover 19 formed with the standard, into the space therebelow where it is received telescopically within a guide tube 20, so as to freely move vertically therein.

Engaged in the other side of the hub 16, and held by the plate 17, is a head 21 of a rectangular bar 22, one of its faces' being provided with teeth 23, in the manner of Specification of Letters Patent. Application filed July 2, 1918.

`Patented Feb. 4, `1919. Serial No. 242,999.

a rack, the same also extending downward through an opening in the cover plate 19.

Engaged at the outer upper end of the telescopic guide tube 20, is a band 25, having a lateral projection 26, which is pivoted by the pin 27, to the forked ends 28 of a rod 29, t e same extending outward through a is a compression spring 33 adapted to normally hold the rod outward.

lso secured to the band 25, at the lower portion thereof, is an arm 35, having a blade like detent 36, adapted to. engage in the spaces between the teeth 23 of the rack when the rod 29 is pressed outwardly, due to the compression ofthe spring 33, by actuating the knob 32.

In operation, it being desirable to either raise or lower the head or top 15 of the stand, the knob 32 is pressed inwardly overcoming the eii'ect of the spring, thereby rotating the band 25 and withdrawing the detent 36,

rack and permitting the upper pormay be desired, while immediately upon releasing the knob 32, the spring acts to force the detent into position, holding the top of the stand in adjustment.

From the foregoing it will be seen that an effective device has been presented whereby the upper portion of the stand may be readily raised or lowered and when in any adjusted position that it is securely locked against displacement.

aving thus described my invention what claim as new and desire to secure by Letters Patent, is:

In an adjustable stand, the combination with a rectangular base, legs radially attached to said base extending outward therefrom, a top engageable over said base, a bar secured in the lower surface of said top, said bar extending downward into said base, a telescopic guide tube mounted vertically in said base in which said bar operates, a parallel thereto, the teeth of said detent being engageable with said rack, a rod slidable transversely in said hollow base, one of the ends of said rod being said detent is removed Jrorn the teeth of said connected to said detent whereby it may be rack permitting said top to be moved up or operated, a knob secured to the outer end down relative to said base. 10 of said rod, a Spring interposed between said In testimony whereof I have affixed my 5 rod and said base whereby said rod is held signature.

normally outward, and means operative upon the depression of Said knob whereby Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patenti. Washington, D.

MICHAL TYMCZYNA. 

